My ROC changed to "Card is being produced" on Jan 22nd (last Monday) and "Approved" on Jan 23rd. My status hasn't yet updated with the mailing details, but among those who were approved at the same time, neither has anyone else's (yes, I've been checking). They're probably doing them in batches and I expect to hear something by the end of the week, if AOS was any indication.
As others have said, with your expired GC and the extension letter, you're fine. I know you're excited to get the new card - I am too! - but just chill, it'll happen soon.